May 8, 2016 - 9:35 AM
in reply to michele19
Hi michele19, welcome to MySwissAlps!
The Bernina Express is very scenic indeed. By late March you'll probably get to experience very diverse scenery, from spring-like circumstances near Tirano to wintry landscapes up at the Bernina Pass. The Bernina Express runs in late March. A link to the timetable can be found under "More on other websites" here. Information on seat reservation and tickets is listed here.
Skiing should be possible near St. Moritz by that time. Do mind that late March is near the end of the winter season, and this may mean that some ski lifts start closing or are closed already. The St. Moritz tourist website may be of further help.
Once your plans are set, I suggest you start looking into rail passes. A Swiss Half Fare Card may be worth your money. Alternatively, quite some hotels in St. Moritz offer discounted ski passes.